:root {
    --red-line: #DA291C;
    --orange-line: #ED8B00;
    --blue-line: #003DA5;
    --green-line: #00843D;
    --silver-line: #7C878E;
    
    --primary-color: #00593B;
    --secondary-color: #00A86B;
    --accent-color: #78C2AD;
    --light-bg: #F5F9F7;
    --dark-bg: #1A3C2A;
    --text-color: #333333;
    --light-text: #FFFFFF;
    --border-color: #D1E7DD;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.6;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 24px 32px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 32px;
}

header h1 {
    font-size: 29px;
    font-weight: 600;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 24px;
}

.main-nav a {
    color: var(--light-text);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.main-nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

.main-nav a.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 500;
}

.authors {
    text-align: right;
    font-size: 14px;
}

.course {
    opacity: 0.8;
    font-style: italic;
}

.dashboard-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    max-width: 1400px;
    margin: 32px auto;
    gap: 32px;
}

.sidebar {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.dashboard-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.key-insights {
    padding: 24px;
}

.key-insights h2 {
    margin-bottom: 20px;
    font-size: 19px;
    color: var(--primary-color);
}

.insight {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 16px;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.insight:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.insight-icon {
    width: 40px;
    height: 40px;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.insight-text h3 {
    font-size: 14px;
    margin-bottom: 4px;
}

.insight-text p {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.dashboard-section {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.section-header {
    padding: 16px 24px;
    background-color: var(--primary-color);
    color: white;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
}

.section-header h2 {
    font-size: 18px;
    font-weight: 500;
}

.last-updated {
    font-size: 13px;
    opacity: 0.9;
}

.visualization-container {
    padding: 24px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    min-height: 400px;
}

.visualization-container.two-column {
    grid-template-columns: 1fr 1fr;
}

.chart-container {
    background-color: var(--light-bg);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-container::before {
    content: "";
    color: #adb5bd;
    font-size: 14px;
    position: absolute;
}

.map-container {
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    min-height: 400px;
    background-color: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-container::before {
    content: "";
    color: #adb5bd;
    font-size: 14px;
    position: absolute;
}

.map-description {
    background-color: var(--light-bg);
    padding: 20px;
    margin: 0 24px;
    border-radius: 6px;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-color);
    border-left: 4px solid var(--secondary-color);
}

.map-description p {
    margin-bottom: 12px;
}

.map-description p:last-child {
    margin-bottom: 0;
}

.subway-legend {
    padding: 16px;
    margin-top: 16px;
    background-color: white;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.subway-legend h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.legend-item {
    display: grid;
    grid-template-columns: 30px 1fr;
    align-items: center;
    margin-bottom: 8px;
    font-size: 14px;
}

.active-trains-count {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 15px;
}

.active-trains-count strong {
    color: var(--primary-color);
    font-size: 18px;
}

.line-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    margin-right: 5px;
    vertical-align: middle;
}

.line-red {
    background-color: var(--red-line);
}

.line-orange {
    background-color: var(--orange-line);
}

.line-blue {
    background-color: var(--blue-line);
}

.line-green {
    background-color: var(--green-line);
}

.line-silver {
    background-color: var(--silver-line);
}

@keyframes pulse-train {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.15);
    }
    100% {
        transform: scale(1);
    }
}

.train-marker {
    animation: pulse-train 2s infinite;
}

.live-indicator {
    display: inline-flex;
    align-items: center;
    background-color: #dc3545;
    color: white;
    padding: 4px 8px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    margin-left: 8px;
}

.live-indicator i {
    font-size: 10px;
    margin-right: 4px;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.3; }
    100% { opacity: 1; }
}

.coming-soon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #6c757d;
    text-align: center;
    opacity: 0.7;
}

.coming-soon i {
    font-size: 40px;
    margin-bottom: 16px;
    color: var(--secondary-color);
    opacity: 0.5;
}

.coming-soon p {
    font-size: 16px;
    font-weight: 500;
}

footer {
    background-color: var(--dark-bg);
    color: var(--light-text);
    padding: 24px 32px;
    margin-top: 32px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    font-size: 14px;
}

.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--secondary-color);
}

.loading-indicator i {
    font-size: 32px;
    margin-bottom: 16px;
}

.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #dc3545;
    padding: 16px;
    text-align: center;
}

.error-state i {
    font-size: 32px;
    margin-bottom: 16px;
}

.error-details {
    font-size: 14px;
    color: #6c757d;
    margin: 8px 0 16px;
}

.vehicle-marker {
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

#transit-map {
    width: 100%;
    height: 100%;
    min-height: 400px;
    border-radius: 6px;
}

.container {
    max-width: 1400px;
    margin: 32px auto;
    padding: 0 24px;
}

.page-header {
    margin-bottom: 32px;
    text-align: center;
    padding: 32px 0;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.page-header h1 {
    font-size: 35px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.page-header p {
    font-size: 18px;
    color: #666;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 48px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.contact-form-container {
    background-color: white;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.contact-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 24px;
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 24px;
    align-items: start;
}

.contact-image {
    font-size: 64px;
    color: var(--secondary-color);
    text-align: center;
}

.contact-details h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.contact-details p {
    margin-bottom: 8px;
}

.contact-details i {
    color: var(--secondary-color);
    margin-right: 8px;
    width: 20px;
    text-align: center;
}

.contact-details .bio {
    margin: 16px 0;
    line-height: 1.6;
}

.social-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, 36px);
    gap: 12px;
    margin-top: 16px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--light-bg);
    color: var(--secondary-color);
    border-radius: 50%;
    transition: all 0.2s;
}

.social-link:hover {
    background-color: var(--secondary-color);
    color: white;
}

.contact-form-container h2 {
    margin-bottom: 24px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 16px;
}

.form-group textarea {
    resize: vertical;
}

.project-info {
    background-color: white;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.project-info h2 {
    color: var(--primary-color);
    margin-bottom: 16px;
}

.project-info p {
    margin-bottom: 16px;
    line-height: 1.6;
}

.history-content {
    background-color: white;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.history-section {
    margin-bottom: 48px;
}

.history-section h2 {
    color: var(--primary-color);
    margin-bottom: 24px;
    font-size: 29px;
}

.history-section p {
    margin-bottom: 16px;
    line-height: 1.7;
}

.timeline {
    margin: 32px 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 100px;
    width: 2px;
    background-color: var(--secondary-color);
}

.timeline-item {
    position: relative;
    padding-left: 150px;
    margin-bottom: 32px;
}

.timeline-date {
    position: absolute;
    left: 0;
    width: 80px;
    text-align: right;
    font-weight: 700;
    color: var(--primary-color);
}

.timeline-date::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -30px;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content {
    background-color: var(--light-bg);
    padding: 16px;
    border-radius: 4px;
    position: relative;
}

.timeline-content h3 {
    margin-bottom: 8px;
    color: var(--primary-color);
}

.line-info-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.line-info {
    background-color: var(--light-bg);
    padding: 24px;
    border-radius: 8px;
}

.line-info h3 {
    display: grid;
    grid-template-columns: 30px 1fr;
    align-items: center;
    margin-bottom: 16px;
}

.line-info .line-icon {
    margin-right: 12px;
}

.mbta-facts {
    list-style-type: none;
    padding-left: 24px;
    margin-bottom: 24px;
}

.mbta-facts li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
}

.mbta-facts li::before {
    content: '\f238';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

.station-search {
  padding: 16px;
  margin-top: 16px;
  background-color: white;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.station-search h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--primary-color);
}

.search-container {
  display: flex;
  margin-bottom: 12px;
}

.search-container input {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px 0 0 4px;
  font-size: 14px;
}

.search-container button {
  background-color: var(--secondary-color);
  color: white;
  border: none;
  border-radius: 0 4px 4px 0;
  padding: 0 12px;
  cursor: pointer;
}

.search-results {
  max-height: 200px;
  overflow-y: auto;
}

.station-item {
  padding: 8px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
}

.station-item:hover {
  background-color: var(--light-bg);
}

.station-name {
  font-weight: 500;
}

.station-line {
  font-size: 13px;
  color: #666;
}

.approaching-trains {
  margin-top: 8px;
  font-size: 13px;
}

.train-arrival {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
}

.no-results {
  padding: 8px;
  color: #666;
  font-style: italic;
}

.station-marker {
  z-index: 1000;
}


.chart-container svg {
    overflow: visible;
}

.chart-container text {
    fill: var(--text-color);
}

.chart-container .axis path,
.chart-container .axis line {
    stroke: var(--border-color);
}

.chart-container .axis text {
    font-size: 10px;
}

.tooltip {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    pointer-events: none;
    z-index: 1000;
    font-size: 12px;
}


@media (max-width: 1200px) {
    .dashboard-container {
        margin: 24px;
        gap: 24px;
    }
}

@media (max-width: 992px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }
    
    .visualization-container.two-column {
        grid-template-columns: 1fr;
    }
    
    .chart-container, .map-container {
        margin-bottom: 24px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        gap: 16px;
    }
    
    .authors {
        text-align: center;
    }
    
    .main-nav ul {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        gap: 16px;
    }
    
    .subway-legend {
        margin-top: 16px;
    }
    
    .visualization-container {
        padding: 16px;
    }
    
    .map-description {
        margin: 0 16px 16px;
        padding: 16px;
    }
    
    .contact-card {
        grid-template-columns: 1fr;
    }
    
    .contact-image {
        margin-bottom: 16px;
    }
}